Secure communication using identity based encryption core. In this section, we show several other unrelated applications. Fuzzy identitybased encryption cryptology eprint archive. Identitybased encryption is a promising possibility to ensure fuzzy. A novel fuzzy encryption technique based on multiple right. Not only do our schemes provide public parameters whose size is independent of the number of attributes in each identity used as public key but they also have useful structures which result in more efficient key extraction andor encryption than the random oracle version of sahai and. Fuzzy identitybased encryption proceedings of the 24th. The search for encryption systems with complex functionalities arguably originates with the eld of modern cryptography itself. At eurocrypt 2005, sahai and waters presented the fuzzy identity based encryption fuzzy ibe which could be used for biometrics and attributebased encryption in the selectiveidentity model. Attributebased encryption abe was originally proposed by sahai and waters 52 in 2005, and is also known as fuzzy identitybased encryption. The sender has a set of attributes and some of them are employ to encrypt the plain text, and only receivers whose.
In this paper, we consider the problem of predicate encryption and focus on the predicate for testing whether the hamming distance between the attribute x of a data item and a target v is equal to or less than a threshold t where x and v are of length m. We propose a new type of identity based encryption that we call fuzzy identity based encryption. In this work, we construct \ fuzzy identity based encryption from the hardness of the standard learning with errors lwe problem. Fully secure fuzzy identitybased encryption for secure iot. Anonymous fuzzy identitybased encryption for similarity search 3 can see the entire x this is allowed by that application semantics. Add a list of references from and to record detail pages load references from and. We introduce a new type of identitybased encryption ibe scheme that we call fuzzy identitybased encryption. New constructions of fuzzy identitybased encryption citeseerx. For example, if your birthday were july 4th, you would enter 0704rtx5. The concept of fuzzy identity based encryption ibe recently introduced by sahai and waters 11 is to provide an errortolerance property for ibe.
New constructions of fuzzy identitybased encryption. Proposed scheme in this paper we proposed a fuzzy which uses setup, extract, encryption and decryption. In a fuzzy identity based encryption scheme a user with secret key for the identity id is able to decrypt a ciphertext encrypted with the public key id if and only if id. Alice authenticates herself to an authority and obtains the private key corresponding to this id.
Pdf at eurocrypt 2005, sahai and waters presented the fuzzy identity based encryption fuzzyibe which could be used for biometrics and. Fully secure fuzzy identitybased encryption for secure. Email message from relayhealth system password is sent in the clear adversary could reset password back to mailed one prescriptions, appointments, lab results, online visits ibe. When a secure fuzzy ibe scheme in the selectiveidentity model is transformed to full identity model it exist an exponential loss of security. Bf01 public key encryption scheme where public key is an arbitrary string id. More precisely, a functional encryption scheme for a given functionality consists of the following four algorithms. Fuzzy identitybased encryption scheme, recently proposed by sahai and waters in 3, is one such mechanism. Only in 2001, shamirs open problem was independently solved by boneh and franklin 3 and cocks 4. Idbased encryption, or identitybased encryption ibe, is an important primitive of idbased cryptography. When a secure fuzzy ibe scheme in the selectiveidentity model is transformed to full identity model it exist an. Fuzzy identitybased signature fibs is exactly like a traditional identitybased signature ibs except that a signature issued under an identity id can be verified under any identity id. The key server maintains a pair of public and private master keys. A fuzzy ibe scheme is exactly like an identity based encryption scheme except that considering identities as bitvectors in f0. In such case, mr security seems to be a proper choice.
Fuzzy identity based encryption fibe, proposed by sahai and waters, is a new kind of identity based encryption. Fuzzy attribute authentication scheme based on vector space. In this paper, we propose anonymous fuzzy identitybased encryption schemes to handle both the equality i. We give cpa and cca secure variants of our construction, for small and large universes of attributes. Thanks to their successful realization of identity based encryption, identity based cryptography is now hot area within the research community. The ability to use identities as public keys can naturally eliminate the need for certificates as used in the.
Identitybased encryption, revocation, provable security. We introduce a new type of identity based encryption ibe scheme that we call fuzzy identity based encryption. Given a security parameter k0, the private key generator pkg generates the master secret key ms and the public parameters of the system. A hierarchical identitybased encryption hibe scheme can be converted into a hierarchical identitybased signature hibs scheme as mentioned in 2. Recall that in identitybased encryption sha84, any string can serve as a public key, and the corresponding secret keys are generated and administered by a trusted private key generator pkg. Weintroduceanewtypeofidentitybasedencryptionibe scheme that we call fuzzy identitybased encryption. However, existing fibe schemes suffer from the following disadvantages. Identity based encryption reduces the amount of keys to be managed. An identitybased encryption technique using subtree for.
Traditional public key cryptosystems use very long integers, typically 2048 bits, as public keys. To use this software, you will need to have the java pairing based cryptography libraryjpbc installed jpbc1. An introduction to identity based encryption matt franklin u. Fuzzy certificateless identitybased encryption protocol. The fuzzy selection of rts is variable and depends upon pixels of the secret image.
Identitybased encryption was proposed by adi shamir in 1984. As of now, i enabled fips mode in the group policy as well as turned bitlocker off and back on to ensure it is using the proper encryption method. Fuzzy identitybased encryption fibe scheme is a kind of identitybased encryption ibe scheme, in which any users identity is composed by a set of attributes and any ciphertext encrypted under identity id can be decrypted by using a private key corresponding to. A new biometric identity based encryption scheme url. All are secure against selectiveidentity attacks in the standard model. The advancement of the cloud storage technology opens up a wide range of possibilities for adaptable data sharing. In this paper, we give a fuzzy certificateless identitybased encryption scheme from lattice, whose security is based on. Due to their conjectured resistance to quantum cryptanalysis, strong worstcaseaveragecase security guarantees, ease of implementation and increasing practicality, latticebased cryptography is one of the hottest and fastest moving areas in mathematical cryptography today. When sharing data to an extensive number of users with fuzzy identities, the data proprietor must use an appropriate identitybased encryption technique that satisfies both efficiency and security prerequisites. Anonymous fuzzy identitybased encryption for similarity. Towards keyprivacy in a fuzzy identitybased encryption scheme. Adaptiveid secure revocable identitybased encryption. Securing brokerless publishsubscribe system using fuzzy. It allows users with identity w can decrypt ciphertext for w if and only if w is close enough to w.
New fuzzy identitybased encryption in the standard model article pdf available in informatica 2. Been having a great deal of difficulty understanding the use of simulators to prove security of abe schemes so i though i would start from the first abe paper fuzzy identity based encryption to try and understand it better from my understanding of the use of simulators, the idea is to show that a simulator can be created which is acting in the ideal world but through the view of the. Fuzzy identitybased encryption fuzzy identitybased encryption fibe is a kind of public key cryptography. Namely, in fuzzy ibe, a user with the secret key for the identity. In annual international conference on the theory and applications of cryptographic techniques, springer, berlin, 457473. Ppt fuzzy identity based encryption powerpoint presentation. In this paper we construct two new fuzzy identitybased encryption ibe schemes in the random oracle model. A fuzzy ibe scheme is exactly like an identitybased encryption scheme except that considering identities as bitvectors in f0. As such it is a type of publickey encryption in which the public key of a user is some unique information about the identity of the user e. Its algorithm model designed is based on the shamirs secret sharing and bili12 near pairings in cyclical group. Authors of fuzzy identitybased encryption win iacr test. Pdf new fuzzy identitybased encryption in the standard. Im trying to make sure my computer is fips compliant with government standards of encryption outlined in sp 800171 rev 2. In identity based encryption, a string used to identify the user can be the public key of that user.
This paper presents a novel image encryption technique based on multiple right translated aes gray sboxes rtss and phase embedding technique. In fuzzy ibe, we view an identity as a set of descriptive attributes. In a fuzzy identitybased encryption ibe scheme, a user with the secret key for an identity id is able to decrypt a ciphertext encrypted with another identity id. Pdf new fuzzy identitybased encryption in the standard model. This software is a java realization for ciphertextpolicy attribute based encryption cpabe. In a fuzzy identitybased encryption ibe scheme, a user with the secret key for an identity id is able to decrypt a ciphertext encrypted with another identity id if and only if id and id are within a certain distance of each other as judged by some metric. Fuzzy identity based encryption request pdf researchgate. A fuzzy ibe scheme allows for a private key for an identity. In a fuzzy identity based encryption scheme a user with secret key for the identity id is able to decrypt a ciphertext encrypted with the public key id0 if and only if id and id0.
This means that a sender who has access to the public parameters of the system can encrypt a message using e. Fuzzy attribute authentication scheme based on vector spacej. Given a users identity and ms, the pkg returns the corresponding private. Lncs 6506 anonymous fuzzy identitybased encryption for. Since this time, identitybased cryptography has been a heavilyresearched topic in the field of cryptography 2.
Keygen applies the master key to an identity to generate the private key for that identity. Then two random masks are used to enhance confusion in the spatial and frequency domains of the. Attribute based encryption abe was first introduced in a paper titled fuzzy identity based encryption fibe by sahai and waters 8. Adaptiveid secure revocable identitybased encryption beno t libert1 and damien vergnaud2. The concept of fuzzy identitybased encryption ibe recently introduced by sahai and waters 11 is to provide an errortolerance property for ibe. In a fuzzy identitybased encryption scheme, a user with the secret key for the identity. We take the rst step in this direction by constructing a fuzzy identity based encryption fuzzy ibe scheme based on lattices. Existing solutions either do not provide attribute protection or produce a big ciphertext of size o2 m. Identitybased encryption with efficient revocation georgia tech. We take the rst step in this direction by constructing a fuzzy identitybased encryption fuzzy ibe scheme based on lattices. Fuzzy identitybased encryption fibe is a good candidate for resolving this problem.
Biometrics, cryptographic applications, identity based signatures, repudiation 1 introduction in this paper we present a biometric identity based signature scheme bioibs. This property allows fibs having an efficient application in biometric authentication and only four schemes on lattices exist, among which three constructions are. Anonymous fuzzy identitybased encryption for similarity search 63 does not provide the property of anonymity i. Fuzzy identities and attributebased encryption springerlink. First of all, a secret image is diffused with a fuzzily selected rts. Circular and kdm security for identitybased encryption. It is a type of publickey encryption, in which the public key of a user is any unique information about the identity of the user, like an email address for example. In fuzzy ibe we view an identity as set of descriptive attributes. Identitybased cryptography data security blog thales. This remained an open problem until 2001, when two independent lines of research boneh and franklin 4, as well as cocks 6 arrived at solutions to the problem. Cryptanalysis of a fuzzy identity based encryption scheme. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
Setup establishes the pkgs parameter pk public key and mk master key. It allows users with identity w to decrypt a ciphertext for w if and only if w. Request pdf fuzzy identity based encryption we introduce a new type of identitybased encryption ibe scheme that we call fuzzy identitybased. Bibliographic details on fuzzy identitybased encryption. Encryption no portable device requirement cant carry rsa public key. Identity based encryption ibe, introduced by shamir in crypto 1984, is a public key encryption mechanism where an arbitrary string such as a users phone number, email address, identity number, etc.
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